A connection structure and pipe bending mold

Abstract

The present invention belongs to the technical field of automobile air-conditioning systems, and discloses a connection structure and a pipe bending mold. The connection structure includes a pipe body and a docking piece. The pipe body is provided with a bending portion formed by bending, and the outer wall of the pipe body is provided with an annular clamping protrusion, which is located between the bending portion and the docking end of the pipe body. The docking piece is provided with a connection hole and a fixing hole, and the pipe body is inserted into the connection hole, and the bending portion and the annular clamping protrusion are respectively against the two ends of the connection hole. The pipe bending mold is used to form the above-mentioned connection structure. In the present invention, by providing a docking piece, and cooperating with the bending portion and the annular clamping protrusion on the pipe body, the docking piece and the pipe body can be connected by bending the pipe body, which simplifies the connection process, reduces the manufacturing cost, and can be applicable to the connection of joints of different specifications, thereby reducing the types of connectors, facilitating storage and management, and avoiding waste gas pollution and harm to the operator's body in the existing welding process.

Description

Technical Field

[0001] The invention relates to the technical field of automobile air-conditioning systems, and in particular to a connection structure and a pipe bending die. Background Art

[0002] In existing automobile air conditioning systems, the process flow of pipe production is usually to first bend the pipe body and then weld the butt joint to the bent pipe body, or to first weld the butt joint to the pipe body and then bend the pipe body.

[0003] In the existing process, the butt joint and the pipe body are welded together. The welding process requires materials such as welding tooling, flux, soldering agent and welding equipment. There is a high probability of producing defective products such as weld flow, overburning and cold welding after welding. The material cost and labor cost are high, the molding quality is poor, and waste gas is generated during welding to pollute the environment.

[0004] Existing butt joints are usually machined parts made of aluminum profiles, which have a relatively high cost and are more likely to produce defects such as blackening during welding due to surface cleanliness issues. Summary of the invention

[0005] The object of the present invention is to provide a connection structure and a pipe bending die, so that a butt joint and a pipe body can be connected by bending the pipe body.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A connection structure, comprising:

[0008] A tube body, wherein a bending portion is provided on the tube body, and an annular clamping protrusion is provided on the outer wall of the tube body, and the annular clamping protrusion is located between the bending portion and the butt end of the tube body;

[0009] A docking piece is provided with a connecting hole and a fixing hole, the tube body is passed through the connecting hole, and the bending portion and the annular clamping protrusion are respectively against two ends of the connecting hole.

[0010] Preferably, a limiting seat is provided on the docking member, a limiting groove is provided on one side of the limiting seat close to the bending portion, and the tube body is engaged in the limiting groove.

[0011] Preferably, a reinforcing rib is provided on one side of the limiting seat close to the annular clamping protrusion.

[0012] Preferably, one end of the connecting hole close to the annular clamping protrusion is concave to form a receiving portion, and the annular clamping protrusion is inserted into the receiving portion.

[0013] Preferably, the tube body is formed by upsetting and spinning, and the docking piece is formed by die casting.

[0014] A pipe bending die, used for forming the above-mentioned connection structure, comprising:

[0015] A first profiling mold, wherein the first profiling mold is provided with a first profiling groove for clamping the tube body;

[0016] A first clamping die, wherein the first clamping die is provided with a first clamping die groove for clamping the docking piece;

[0017] The second clamping die is provided with a second clamping die groove for clamping the docking part, the first clamping die groove and the second clamping die groove cooperate to clamp the docking part, and the first clamping die and the second clamping die can be rotated relative to the first supporting die to bend the tube body to form the bending part.

[0018] Preferably, it also includes a second supporting mold, on which a second supporting mold groove is provided for clamping the tube body; the first clamping mold is provided with a first tube clamping groove for clamping the tube body, and the second clamping mold is provided with a second tube clamping groove for clamping the tube body, the first tube clamping groove and the second tube clamping groove cooperate to clamp the tube body, and the first clamping mold and the second clamping mold can bend the tube body by rotating relative to the second supporting mold.

[0019] Preferably, two slide seats are further included, and the first backing mold and the second backing mold are slidably mounted on the two slide seats respectively.

[0020] Preferably, it further comprises a clamping mold base, and one end of the first clamping mold is clamped to the clamping mold base.

[0021] Preferably, it further comprises a clamping claw, which clamps one end of the tube body when the tube body is bent.

[0022] Beneficial effects of the present invention:

[0023] By providing a butt joint, and co-providing a bending portion and an annular convexity on the pipe body, the butt joint and the pipe body can be connected by bending the pipe body, thereby simplifying the connection process, reducing the manufacturing cost, and being applicable to the connection of joints of different specifications, thereby reducing the types of connectors, facilitating storage and management, and avoiding waste gas pollution and harm to the health of operators in existing welding processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of a connection structure according to an embodiment of the present invention;

[0025] Figure 2 is a schematic diagram of a pipe body in a connection structure according to an embodiment of the present invention;

[0026] Figure 3is a schematic structural diagram of one aspect of the docking piece according to an embodiment of the present invention;

[0027] Figure 4 is a structural schematic diagram of another direction of the docking piece according to an embodiment of the present invention;

[0028] Figure 5 Schematic diagram of the structure of the pipe bending die according to an embodiment of the present invention;

[0029] Figure 6 is a schematic structural diagram of a first prototype according to an embodiment of the present invention;

[0030] Figure 7 is a structural schematic diagram of a first clamping mold according to an embodiment of the present invention;

[0031] Figure 8 is a schematic structural diagram of a second clamping mold according to an embodiment of the present invention;

[0032] Fig. 9 It is a schematic structural diagram of the second prototype described in an embodiment of the present invention.

[0033] In the figure:

[0034] 1. Tube body; 11. Bending portion; 12. Annular convex portion;

[0035] 2. docking piece; 21. connecting hole; 211. accommodating portion; 22. fixing hole; 23. limiting seat; 231. limiting groove; 232. reinforcing rib;

[0036] 100, a first profiling mold; 101, a first profiling mold groove;

[0037] 200, first clamping die; 201, first clamping die groove; 202, first pipe clamping groove;

[0038] 300, second clamping die; 301, second clamping die groove; 302, second pipe clamping groove;

[0039] 400, second master mold; 401, second master mold groove;

[0040] 500, slide seat;

[0041] 600, clamping die base;

[0042] 700. Gripper. DETAILED DESCRIPTION

[0043] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0044] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0045] like Figure 1-Figure 9 As shown, the present invention provides a connection structure, including a pipe body 1 and a docking piece 2. The pipe body 1 is provided with a bent portion 11, and an annular clamping protrusion 12 is provided on the outer wall of the pipe body 1, and the annular clamping protrusion 12 is located between the bent portion 11 and the docking end of the pipe body 1. The docking piece 2 is provided with a connection hole 21 and a fixing hole 22, the pipe body 1 is inserted into the connection hole 21, and the bent portion 11 and the annular clamping protrusion 12 are respectively against the two ends of the connection hole 21.

[0046] In the present invention, by providing a docking piece 2, and co-arranging a bending portion 11 and an annular cam 12 on the pipe body 1, the docking piece 2 and the pipe body 1 can be connected by bending the pipe body 1, which simplifies the connection process, reduces the manufacturing cost, and can be applicable to the connection of joints of different specifications, thereby reducing the types of connectors, facilitating storage and management, and avoiding waste gas pollution and harm to the health of operators in existing welding processes.

[0047] In this embodiment, a limiting seat 23 is provided on the docking member 2, a limiting groove 231 is provided on the side of the limiting seat 23 close to the bending portion 11, the tube body 1 is engaged in the limiting groove 231, and a reinforcing rib 232 is provided on the side of the limiting seat 23 close to the annular clamping protrusion 12. The provision of the limiting groove 231 prevents the docking member 2 from rotating relative to the tube body 1, and the provision of the reinforcing rib 232 increases the structural strength of the docking member 2, avoids damage to the docking member 2 during the bending connection, and makes the tube body 1 and the limiting groove 231 more closely attached.

[0048] Specifically, one end of the connection hole 21 close to the annular clamping protrusion 12 is concave to form a receiving portion 211, and the annular clamping protrusion 12 is clamped into the receiving portion 211. The above arrangement makes the connection and fixation between the docking piece 2 and the pipe body 1 more reliable.

[0049] More specifically, the tube body 1 is an aluminum tube, which is formed by upsetting and spinning, so as to form an annular protrusion 12 on the tube body 1. The docking piece 2 is formed by die casting, which further reduces the manufacturing cost of the parts and makes the docking piece 2 more solid and reliable when bent and connected.

[0050] The present invention also provides a pipe bending mold for forming the above-mentioned connection structure, and the pipe bending mold includes a first backing mold 100, a first clamping mold 200 and a second clamping mold 300. The first backing mold 100 is provided with a first backing mold groove 101 for clamping the pipe body 1, the first clamping mold 200 is provided with a first clamping mold groove 201 for clamping the docking piece 2, and the second clamping mold 300 is provided with a second clamping mold groove 301 for clamping the docking piece 2. The first clamping mold groove 201 and the second clamping mold groove 301 cooperate to clamp the docking piece 2, and the first clamping mold 200 and the second clamping mold 300 rotate relative to the first backing mold 100 to bend the pipe body 1 to form the bending portion 11, so that the docking piece 2 and the pipe body 1 are connected.

[0051] Specifically, inner grooves for accommodating the side walls of the limiting groove 231 are provided on both sides of the first profiling groove 101 to avoid interference between the first profiling groove 100 and the limiting seat 23 when the docking member 2 and the tube body 1 are bent and connected.

[0052] In this embodiment, the tube bending mold further includes a second backing mold 400. The second backing mold 400 is provided with a second backing mold groove 401 for clamping the tube body 1, the first clamping mold 200 is provided with a first tube clamping groove 202 for clamping the tube body 1, and the second clamping mold 300 is provided with a second tube clamping groove 302 for clamping the tube body 1. The first tube clamping groove 202 and the second tube clamping groove 302 cooperate to clamp the tube body 1, and the first clamping mold 200 and the second clamping mold 300 can bend the tube body 1 by rotating relative to the second backing mold 400. The above arrangement enables the tube bending mold of this embodiment to perform secondary bending on the tube body 1 in addition to connecting the butt joint 2 and the tube body 1, thereby improving the molding efficiency and reducing the manufacturing cost.

[0053] Specifically, the first backing mold 100 and the second backing mold 400 are slidably mounted on two slide seats 500, and one end of the first clamping mold 200 is clamped on the clamping mold base 600. When the tube body 1 is bent, the clamping mold base 600 drives the first clamping mold 200 to rotate, and the first backing mold 100 and the second backing mold 400 can be driven to slide on the slide seat 500 through the driving member.

[0054] More specifically, the tube bending mold of the present invention further comprises a clamp 700, which comprises three claws, and the three claws are circumferentially close to each other to clamp the tube body 1. When the tube body 1 is bent, the clamp 700 clamps one end of the tube body 1.

[0055] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A pipe bending die for forming a connection structure, the connection structure comprising: A tube body (1), wherein the tube body (1) is provided with a bent portion (11), an annular clamping protrusion (12) is provided on the outer wall of the tube body (1), and the annular clamping protrusion (12) is located between the bent portion (11) and the butt end of the tube body (1); A docking piece (2), wherein the docking piece (2) is provided with a connecting hole (21) and a fixing hole (22), the tube body (1) is inserted into the connecting hole (21), and the bent portion (11) and the annular clamping protrusion (12) are respectively abutted against two ends of the connecting hole (21); A limiting seat (23) is provided on the docking member (2), a limiting groove (231) is provided on a side of the limiting seat (23) close to the bending portion (11), and the tube body (1) is engaged in the limiting groove (231); A reinforcing rib (232) is provided on one side of the limiting seat (23) close to the annular clamping protrusion (12); One end of the connection hole (21) close to the annular clamping protrusion (12) is concave to form a receiving portion (211), and the annular clamping protrusion (12) is clamped into the receiving portion (211); The tube body (1) is obtained by upsetting and spinning, and the docking piece (2) is obtained by die casting; Characterized in that the pipe bending die comprises: A first profiling mold (100), wherein the first profiling mold (100) is provided with a first profiling groove (101) for clamping the tube body (1); A first clamping die (200), the first clamping die (200) being provided with a first clamping die groove (201) for clamping the butt joint member (2); A second clamping die (300), wherein the second clamping die (300) is provided with a second clamping die groove (301) for clamping the docking piece (2), wherein the first clamping die groove (201) and the second clamping die groove (301) cooperate to clamp the docking piece (2), and wherein the first clamping die (200) and the second clamping die (300) are rotated relative to the first supporting die (100) to bend the tube body (1) to form the bending portion (11).

2. The pipe bending die according to claim 1, characterized in that: It also comprises a second profiling mold (400), wherein the second profiling mold (400) is provided with a second profiling groove (401) for clamping the tube body (1); The first clamping die (200) is provided with a first tube clamping groove (202) for clamping the tube body (1), and the second clamping die (300) is provided with a second tube clamping groove (302) for clamping the tube body (1). The first tube clamping groove (202) and the second tube clamping groove (302) cooperate to clamp the tube body (1), and the first clamping die (200) and the second clamping die (300) are rotated relative to the second backing die (400) to bend the tube body (1).

3. The pipe bending die according to claim 2, characterized in that: It also comprises two slide seats (500), and the first backing mold (100) and the second backing mold (400) are respectively slidably mounted on the two slide seats (500).

4. The pipe bending die according to claim 1, characterized in that: It also comprises a clamping die base (600), and one end of the first clamping die (200) is clamped on the clamping die base (600).

5. The pipe bending die according to claim 1, characterized in that: It also comprises a clamping claw (700) which clamps one end of the tube body (1) when the tube body (1) is bent.

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