Communication pipe lead-in angle forming structure

Abstract

The utility model discloses a communicating pipe lead-in angle forming structure, which belongs to the technical field of metal fitting forming and comprises a communicating pipe and a forming die, a concave cavity is arranged on the forming die, and a concave cavity arc-shaped part is arranged on the inner wall of the concave cavity. The front end of the communicating pipe moves in the direction of the concave cavity, and an arc-shaped inward-shrinkage leading-in angle is formed through extrusion of the arc-shaped part of the concave cavity in the moving process. According to the structure, the concave cavity arc-shaped part is arranged on the concave cavity of the forming die, the concave arc shape of the concave cavity arc-shaped part is utilized, so that the front end of the communicating pipe can be extruded into the arc-shaped inward-shrinkage leading-in angle, and as the arc-shaped inward-shrinkage leading-in angle is formed in an extrusion shrinkage mode, scrap iron cannot be generated, the production cost is reduced, and the production efficiency is improved. In addition, the surface of the arc-shaped inward-shrinkage guide-in angle formed through extrusion shrinkage is smooth, sharp burrs are avoided, insertion guide-in assembly of the sealing piece is facilitated, damage to the sealing piece can be avoided, and the sealing assembly effect between pipelines is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of metal fittings forming, in particular to a connecting pipe introduction angle forming structure. Background Art

[0002] The existing air-conditioning compressor and the liquid reservoir are usually connected by a connecting pipe. In order to facilitate the plug-in and introduction of the connecting pipe, the outer wall of the front end of the connecting pipe is provided with an introduction bevel, such as a connection structure of a connecting pipe and a cylinder disclosed in the utility model patent with Chinese patent application number CN201821790406.4, and an end structure of a connecting pipe disclosed in the utility model patent with Chinese patent application number CN202220933267.6. However, the introduction bevel processing of the connecting pipe is mostly carried out by cutting or spinning. The above two processing methods will produce iron cuttings, which not only has high production costs, but also causes iron cuttings to splash during the processing, thereby causing safety accidents. At the same time, the introduction bevel after cutting or spinning is sharp, which causes the connecting pipe to scratch the seal when it is plugged in and introduced, thereby affecting the sealing assembly effect between the pipes.

[0003] Therefore, further improvement is necessary. Utility Model Content

[0004] The utility model aims to provide a connecting pipe introduction angle forming structure to overcome the shortcomings of the prior art.

[0005] A connecting pipe introduction angle forming structure designed for this purpose includes a connecting pipe and a forming mold, wherein the forming mold is provided with a concave cavity, and the inner wall of the concave cavity is provided with a concave cavity arc portion. The front end of the connecting pipe moves toward the direction of the concave cavity, and when moving, an arc-shaped inward-retracted introduction angle is formed by extrusion of the concave cavity arc portion.

[0006] The length dimension of the concave cavity arc portion is greater than the length dimension of the arc-shaped inward-retracting introduction angle.

[0007] The molding die is provided with an exhaust channel, and the exhaust channel is communicated with the concave cavity.

[0008] The exhaust passage is communicated with the end portion or the side portion of the concave cavity.

[0009] A guide portion is arranged at the opening of the concave cavity, and the direction in which the arc-shaped portion of the concave cavity is arranged is opposite to the direction in which the guide portion is arranged.

[0010] The guide portion is arranged in an arc shape or an inclined shape.

[0011] The inner wall of the cavity is also provided with a cavity straight portion, which extends straightly along the axial direction of the cavity, the inner end of the cavity straight portion is connected to the cavity arc portion, and the outer end of the cavity straight portion is connected to the guide portion.

[0012] The structure also includes a base, on which a fixing clamp and a positioning core are arranged, and the rear end of the connecting pipe is positioned on the positioning core and clamped on the fixing clamp.

[0013] The fixing chuck is provided with a clamping portion at one end and a mounting portion at the other end, the clamping portion and the mounting portion are communicated with each other, the positioning core is fixedly provided on the base and is provided with a positioning portion, the fixing chuck is assembled on the positioning core through the mounting portion, the positioning portion extends into the clamping portion, and the rear end of the connecting tube is positioned and inserted into the positioning portion and clamped on the clamping portion.

[0014] A bottom plate is also fixedly arranged on the base and / or the positioning core, and a driving device is connected via the bottom plate.

[0015] The utility model improves the above structure and utilizes the mold extrusion and shrinkage process. A concave cavity arc portion is provided on the concave cavity of the forming mold, and the concave arc shape of the concave cavity arc portion is utilized so that the front end of the connecting pipe can be extruded into an arc-shaped inward-retracted introduction angle. Since the arc-shaped inward-retracted introduction angle is formed by extrusion and shrinkage, iron cutting waste will not be generated, which not only reduces the production cost but also effectively avoids the safety accidents caused by iron cutting splashing. In addition, the surface of the arc-shaped inward-retracted introduction angle formed by extrusion and shrinkage is smooth and does not have sharp burrs, which is not only conducive to the plug-in introduction assembly of the seal but also can avoid the damage of the seal, thereby ensuring the sealing assembly effect between the pipelines and having strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the assembly structure of an embodiment of the utility model.

[0017] Figure 2 for Figure 1 A in the figure is an enlarged structural diagram. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] See also Figure 1 , Figure 2 The connecting pipe introduction angle forming structure includes a connecting pipe 1 and a forming mold 2. The forming mold 2 is provided with a concave cavity 2.1. The inner wall of the concave cavity 2.1 is provided with a concave cavity arc portion 2.2. The front end of the connecting pipe 1 moves toward the direction of the concave cavity 2.1, and when moving, the arc-shaped inward-retracted introduction angle 1.1 is formed by extruding the concave cavity arc portion 2.2.

[0021] This embodiment utilizes the mold extrusion shrinkage process, and a concave cavity arc portion 2.2 is provided on the concave cavity 2.1 of the forming mold 2, and the concave arc shape of the concave cavity arc portion 2.2 is utilized so that the front end of the connecting pipe 1 can be extruded into an arc-shaped inward-retracted introduction angle 1.1. Since the arc-shaped inward-retracted introduction angle 1.1 is formed by extrusion shrinkage, no iron cutting waste is generated, which not only reduces the production cost, but also effectively avoids the safety accidents caused by iron cutting splashing. In addition, the surface of the arc-shaped inward-retracted introduction angle 1.1 formed by extrusion shrinkage is smooth and has no sharp burrs, which is not only conducive to the plug-in introduction assembly of the seal, but also can avoid damage to the seal, thereby ensuring the sealing assembly effect between the pipelines, and has strong practicality.

[0022] As a preferred solution of this embodiment, it may also have the following additional technical features:

[0023] The length dimension of the concave cavity arc portion 2.2 is greater than the length dimension of the arc-shaped inward-retracting introduction angle 1.1, thereby avoiding the problem that the material at the end of the connecting tube 1 hits the edge of the concave cavity arc portion 2.2 during the forming process and causes scratches, and the arc-shaped inward-retracting introduction angle 1.1 is not sufficiently shrunk to ensure the forming stability and forming quality of the arc-shaped inward-retracting introduction angle 1.1.

[0024] The forming die 2 is provided with an exhaust passage 2.3, and the exhaust passage 2.3 is communicated with the concave cavity 2.1.

[0025] The exhaust passage 2.3 is communicated with the end or side of the cavity 2.1.

[0026] In this embodiment, the exhaust passage 2.3 is connected to the end of the cavity 2.1, so as to discharge the air and oil generated when the connecting tube 1 moves toward the cavity 2.1, so as to avoid the problem of uneven surface forming of the arc-shaped inward-retracted introduction angle 1.1 caused by the air in the forming mold 2, and at the same time, it can also reduce the problem of squeezing and straining of the arc-shaped inward-retracted introduction angle 1.1 caused by excessive accumulation of oil in the cavity 2.1.

[0027] A guide portion 2.4 is arranged at the opening of the concave cavity 2.1, and the direction in which the arc-shaped portion 2.2 of the concave cavity is arranged is opposite to the direction in which the guide portion 2.4 is arranged.

[0028] The guide portion 2.4 is arranged in an arc shape or an inclined shape.

[0029] In this embodiment, the guide portion 2.4 is arranged in an arc shape, and the front end of the connecting pipe 1 can enter the concave cavity 2.1 through the guiding effect of the guide portion 2.4.

[0030] The inner wall of the cavity 2.1 is also provided with a cavity straight portion 2.5, which extends straightly along the axial direction of the cavity 2.1, the inner end of the cavity straight portion 2.5 is connected to the cavity arc portion 2.2, and the outer end of the cavity straight portion 2.5 is connected to the guide portion 2.4.

[0031] The other end of the concave arc portion 2.2 is connected to the exhaust channel 2.3.

[0032] In this embodiment, the arrangement of the straight portion 2.5 of the concave cavity can provide stability to the connecting tube 1, and can prevent the connecting tube 1 from swinging or bending in the concave cavity 2.1, so that effective contact is formed between the front end of the connecting tube 1 and the arc-shaped portion 2.2 of the concave cavity, ensuring that the front end of the connecting tube 1 forms an arc-shaped retracted introduction angle 1.1 that matches the shape of the arc-shaped portion 2.2 of the concave cavity.

[0033] The structure also includes a base 3 on which a fixing chuck 4 and a positioning core 5 are provided. The rear end of the connecting pipe 1 is positioned on the positioning core 5 and clamped on the fixing chuck 4, thereby enabling the connecting pipe 1 to be effectively positioned.

[0034] A clamping portion is provided at one end of the fixed chuck 4, and a mounting portion is provided at the other end. The clamping portion and the mounting portion are communicated with each other. The positioning core 5 is fixedly provided on the base 3, and a positioning portion 5.1 is provided thereon. The fixed chuck 4 is assembled on the positioning core 5 through the mounting portion, and the positioning portion 5.1 extends into the clamping portion. The rear end of the connecting pipe 1 is positioned and inserted on the positioning portion 5.1 and clamped on the clamping portion.

[0035] In this embodiment, the inner hole at the rear end of the connecting pipe 1 is positioned by the positioning portion 5.1, and the outer wall is clamped by the clamping portion, thereby ensuring that the connecting pipe 1 will not shake or swing during molding.

[0036] A bottom plate 6 is also fixedly disposed on the base 3 and / or the positioning core 5 , and a driving device is connected via the bottom plate 6 .

[0037] In this embodiment, the driving device can be a telescopic cylinder or a motor-driven slide rail, and the driving device can drive the connecting pipe 1 to reciprocate relative to the forming mold 2, thereby completing the forming of the arc-shaped inward-retracted introduction angle 1.1.

[0038] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A connecting pipe inlet angle forming structure, comprising a connecting pipe (1) and a forming die (2), characterized in that: The forming die (2) is provided with a concave cavity (2.1), the inner wall of the concave cavity (2.1) is provided with a concave cavity arc portion (2.2), the front end of the connecting tube (1) moves in the direction of the concave cavity (2.1), and when moving, an arc-shaped inward retracting introduction angle (1.1) is formed by squeezing the concave cavity arc portion (2.2).

2. The connecting pipe introduction angle molding structure according to claim 1, characterized in that: The length dimension of the concave cavity arc portion (2.2) is greater than the length dimension of the arc-shaped inward-retracting introduction angle (1.1).

3. The connecting pipe introduction angle molding structure according to claim 1, characterized in that: An exhaust channel (2.3) is provided on the forming mould (2), and the exhaust channel (2.3) is in communication with the concave cavity (2.1).

4. The connecting pipe introduction angle molding structure according to claim 3, characterized in that: The exhaust channel (2.3) is in communication with an end portion or a side portion of the concave cavity (2.1).

5. The connecting pipe introduction angle molding structure according to claim 1, characterized in that: A guide portion (2.4) is provided at the opening of the concave cavity (2.1), and the direction in which the concave cavity arc portion (2.2) is provided is opposite to the direction in which the guide portion (2.4) is provided.

6. The connecting pipe introduction angle molding structure according to claim 5, characterized in that: The guide portion (2.4) is arranged in an arc shape or in an inclined shape.

7. The connecting pipe introduction angle molding structure according to claim 5, characterized in that: The inner wall of the concave cavity (2.1) is also provided with a concave cavity straight portion (2.5), the concave cavity straight portion (2.5) extends straightly along the axial direction of the concave cavity (2.1), the inner end of the concave cavity straight portion (2.5) is connected to the concave cavity arcuate portion (2.2), and the outer end of the concave cavity straight portion (2.5) is connected to the guide portion (2.4).

8. The connecting pipe inlet angle forming structure according to any one of claims 1 to 7, characterized in that: It also comprises a base (3), on which a fixing clamp (4) and a positioning core (5) are arranged, and the rear end of the connecting pipe (1) is positioned on the positioning core (5) and clamped on the fixing clamp (4).

9. The connecting pipe introduction angle molding structure according to claim 8, characterized in that: The fixing chuck (4) is provided with a clamping portion at one end and a mounting portion at the other end, the clamping portion and the mounting portion are communicated with each other, the positioning core (5) is fixedly arranged on the base (3) and provided with a positioning portion (5.1), the fixing chuck (4) is assembled on the positioning core (5) through the mounting portion, the positioning portion (5.1) extends into the clamping portion, and the rear end of the connecting pipe (1) is positioned and inserted on the positioning portion (5.1) and clamped on the clamping portion.

10. The connecting pipe introduction angle molding structure according to claim 8, characterized in that: A bottom plate (6) is also fixedly arranged on the base (3) and / or the positioning core (5), and a driving device is connected via the bottom plate (6).

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