A flanging and flaring tool

Abstract

The present invention provides a flanging and flaring tool, which belongs to the field of mechanical technology. It solves the problem that the existing pipe flaring and flanging tools are relatively cumbersome to operate. The flanging and flaring tool includes a main body, the main body has a columnar forming head, the outer side of the forming head has a forming surface, the flanging and flaring tool also includes a cylindrical limiting sleeve sleeved on the outer side of the forming head, a forming cavity for inserting pipe fittings is formed between the limiting sleeve and the forming head, and a positioning structure for positioning the two is also provided between the limiting sleeve and the main body. The flanging and flaring tool has the advantage of being easy to operate.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology and relates to a flanging and expanding tool, in particular to a tool capable of flanging and expanding the end of a pipe. Background Art

[0002] Pipes can be used to transport gaseous or liquid media. In actual use, in order to achieve the connection between pipes and meet the sealing requirements after the connection, it is often necessary to process the end face of the pipe outwardly. The flanging can be used in conjunction with a slip-on flange or nut. Existing pipe flanging is generally processed in the factory by corresponding large-scale processing equipment, and then the flanging pipe is sold for use. However, depending on the actual use site, the length of the pipe used is completely different, and the pipe that has been flanging is difficult to meet the needs of various pipe use environments.

[0003] To this end, the applicant has designed a pipe flaring and flanging tool and applied for a Chinese patent (its application number is: 201811114970.9; its publication number is: CN109013944A). The pipe flaring and flanging tool includes a driving tool, a clamp, a connecting rod 1 and a connecting rod 2 connected to the driving tool, and a limiter that can move relative to the connecting rod 1. The clamp includes a fastener and a clamp 1 and a clamp 2 that are arranged oppositely. The clamp 1 and the clamp 2 can be fastened to the outside of the connecting rod 1 and the connecting rod 2 through the fastener. The clamp can move back and forth along the axial direction of the connecting rod 1 and can be limited by the limiter after moving. When the pipe flaring and flanging tool is in use, the pipe fitting is placed between the clamp 1 and the clamp 2, and the pipe fitting is fixed by tightening the fastener, and then the hydraulically driven driving tool drives the extrusion head to extrude the end of the pipe fitting to form it. Since the entire pipe flaring and flanging tool is only composed of a driving tool, a clamp and other structures, the overall volume is small and easy to carry. It can be conveniently used to perform flaring and flanging operations at the pipe use site, and can meet the use of various pipe fittings. It is more convenient.

[0004] However, when the pipe flaring and flanging tool is actually used, it is necessary to continuously tighten or loosen the fasteners to open and close the clamps to fix and loosen the pipe fittings. If necessary, it is also necessary to adjust the position of the limiter to adjust the position of the clamp. The operation is relatively cumbersome and inconvenient to use. Summary of the invention

[0005] The purpose of the present invention is to address the above-mentioned problems existing in the prior art and to propose a flanging and flaring tool. The technical problem to be solved is how to provide a flanging and flaring tool that can conveniently perform pipe flanging and flaring processing on site.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A flanging and flaring tool comprises a main body, the main body having a columnar forming head, the outer side of the forming head having a forming surface, and the flanging and flaring tool further comprises a cylindrical limiting sleeve sleeved on the outer side of the forming head, a forming cavity for inserting a pipe fitting is formed between the limiting sleeve and the forming head, and a positioning structure is also provided between the limiting sleeve and the main body for positioning the two.

[0008] When producing this flanging and flaring tool, the size of the forming head 1 is matched with the inner hole size of the pipe to be processed so that the pipe can be just sleeved on the outside of the forming head 1. When in use, the limit sleeve is sleeved on the outside of the forming head 1, and the limit sleeve is positioned on the main body through the positioning structure, so that a stable molding cavity is formed between the limit sleeve and the forming head 1, and then the front end of the pipe is extended into the molding cavity and abuts against the molding surface 1. Afterwards, the rear end of the pipe is knocked several times, so that the front end of the pipe gradually deforms and turns outward along the extension direction of the molding surface 1 until the turned-out edge abuts against the side wall of the limit sleeve. After the processing is completed, the pipe can be pulled out of the molding cavity. Afterwards, the pipe is turned over, and the rear end of the pipe is flanging and flaring is achieved in the same way. During this processing, there is no need for separate operation to clamp the pipe fittings, which reduces the operating procedures and facilitates the processing operations. The flanging and expanding of the pipe fittings can be achieved through a simple number of knocks. It is not only easy to operate, but also relatively fast to form. The flanging position of the pipe fitting end is limited by the limit sleeve, which can ensure a stable forming effect. There is no need to specially control the knocking force, which further improves the convenience of pipe processing.

[0009] In the above-mentioned flanging and flaring tool, the positioning structure includes a protruding annular boss on the main body and a concave annular groove on the limiting sleeve, and the boss can be correspondingly snapped into the groove. Through the matching snap connection between the boss and the groove, a stable annular forming cavity is formed between the limiting sleeve and the forming head, and the operation is convenient and quick.

[0010] As another case, in the above-mentioned flanging and flaring tool, the positioning structure includes a magnetic part 1 fixed on the main body and a magnetic part 2 fixed at a corresponding position on the limiting sleeve, and the main body and the limiting sleeve can be positioned relative to each other through the magnetic attraction between the magnetic part 1 and the magnetic part 2. The positioning of the limiting sleeve is achieved by the magnetic part 1 and the magnetic part 2 that can generate magnetic attraction between each other, and the positioning is convenient and accurate.

[0011] In the above-mentioned flanging and flaring tool, the flanging and flaring tool also includes a hand grip, one side of the hand grip has a protruding columnar forming head 2, the outer wall of the forming head 2 has a forming surface 2, and the other side of the hand grip has a protruding gripping portion that can be held by hand. The front end of the pipe fitting is sleeved on the outer side of the forming head 1, while the rear end thereof can be sleeved on the forming head 2. The user can hold the side of the gripping portion and then strike the end of the gripping portion with a hammer or other tool, which not only avoids the situation where the rear end of the pipe fitting is damaged by direct striking, but also can process the rear end of the pipe fitting while the front end of the pipe fitting is being formed by the forming head 2 and the forming surface 2, which is convenient to operate and has high processing efficiency.

[0012] In the above-mentioned flanging and flaring tool, the side wall of the hand grip between the second forming head and the grip portion has a ring-shaped shoulder protruding outward, the side of the shoulder facing the second forming head is a plane, and the second forming surface can extend to the plane of the shoulder. The setting of the shoulder can separate the hand grip position from the position where the pipe is processed and formed, ensuring the user's safety, and at the same time, the plane on the shoulder can extend the forming position of the second forming surface, providing a larger deformation range for the degree of flanging and flaring.

[0013] In the above-mentioned flanging and flaring tool, the main body also includes a base, the forming head 1 is detachably connected to one side of the base, and the other side of the base is a plane. Currently, there are several specifications of pipe fittings commonly used. The detachability of the forming head 1 can make the main body better suitable for pipe fittings of various specifications, and there is no need to carry multiple base parts. The plane on the base is used to stably lean against the wall or the ground to ensure stability during the knocking process.

[0014] In the above-mentioned flanging and flaring tool, the inner side of the limiting sleeve facing the other end of the main body has an inclined guiding surface.

[0015] Compared with the prior art, this flanging and flaring tool has the following advantages:

[0016] 1. Through the setting of the main body and the hand grip, it is possible to conveniently stabilize the positions of the two ends of the pipe to be processed, and to simultaneously perform flanging and expanding processing on both ends of the pipe in one processing process, which is not only convenient to operate but also has high processing efficiency.

[0017] 2. The position of the flange at the front end of the pipe is limited by the limiting sleeve, thus ensuring the stability of the pipe after processing and forming. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure of the flanging and expanding tool.

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure when the flanging and expanding tool is used with a pipe fitting.

[0020] Figure 3 It is an enlarged view of the positioning structure of the flanging and flaring tool.

[0021] In the figure, 1, main body; 1a, forming head one; 1b, forming surface one; 1c, base; 1d, boss; 2, limit sleeve; 2a, guide surface; 2b, groove; 3, forming cavity; 4, grip; 4a, forming head two; 4b, forming surface two; 4c, gripping part; 4d, shoulder; 5, pipe fitting. DETAILED DESCRIPTION

[0022] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0023] like Figure 1 and Figure 2 As shown, the flanging and flaring tool comprises a main body 1 and a grip 4 arranged opposite to each other. The main body 1 comprises a base 1c in the shape of an annulus and a forming head 1a in the shape of a cylinder. Both end surfaces of the base 1c are planes. The inner side of the base 1c has an internal thread. One end of the forming head 1a is threadedly connected to the base 1c. The outer side of the forming head 1a also has a forming surface 1b, which is arranged close to the base 1c and comprises a forming section 1 with a conical surface and a forming section 2 with a concave curved surface. The forming section 1 and the forming section 2 have a smooth transition.

[0024] A cylindrical limiting sleeve 2 is also sleeved on the outer side of the forming head 1a, and a cylindrical forming cavity 3 for inserting the pipe 5 is formed between the limiting sleeve 2 and the forming head 1a. A positioning structure for positioning the two is also provided between the limiting sleeve 2 and the main body 1. In this embodiment, Figure 3 As shown, the positioning structure includes a boss 1d located on the molding head 1a and a groove 2b located on the limiting sleeve 2, wherein the boss 1d is annular and located between the molding surface 1b and the end surface of the base 1c, and the boss 1d protrudes from the molding surface 1b; the groove 2b is annular and located on the inner side of the end of the limiting sleeve 2, the position and size of the groove 2b match the boss 1d, and the boss 1d can be inserted into the groove 2b and realize the positioning of the limiting sleeve 2. The inner side of the other end of the limiting sleeve 2 has an inclined guide surface 2a.

[0025] The hand grip 4 is an integrated structure, with one side having a protruding cylindrical forming head 4a, the outer wall of the forming head 4a having a forming surface 4b, and the other side of the hand grip 4 having a protruding cylindrical gripping portion 4c for hand gripping, the specific length of the gripping portion 4c being based on the convenience of hand gripping and the prevention of injury during the striking process. In order to ensure safety, the hand grip 4 also has a ring-shaped shoulder 4d protruding outward on the side wall between the forming head 4a and the gripping portion 4c, the shoulder 4d facing the forming head 4a and the gripping portion 4c are both planes, and the forming surface 4b can extend to the plane of the shoulder 4d.

[0026] When producing this flanging and flaring tool, the size of the forming head 1a is matched with the inner hole size of the pipe 5 to be processed so that the pipe 5 can be just sleeved on the outside of the forming head 1a, such as a four-point pipe, a six-point pipe, etc. When in use, the limiting sleeve 2 is sleeved on the outside of the forming head 1a, and the limiting sleeve 2 is positioned on the main body 1 through the boss 1d and the groove 2b as a positioning structure, so that a stable molding cavity 3 is formed between the limiting sleeve 2 and the forming head 1a, and the base 1c is placed on a flat place such as a wall or the ground, and then the front end of the pipe 5 is extended into the molding cavity 3 and abutted against the molding surface 1b. The hand-held grip 4c inserts the forming head 2 4a of the hand-held member 4 into the inner side of the rear end of the pipe 5 until the rear end of the pipe 5 abuts against the molding surface 2 4b.

[0027] Afterwards, the end of the gripping portion 4c is struck several times with a hammer or other tool, so that the front end of the pipe fitting 5 gradually deforms and turns outward along the extension direction of the molding surface 1b until the turned-out edge abuts against the side wall of the limit sleeve 2, and the processing is completed. At the same time, the rear end of the pipe fitting 5 also gradually deforms along the extension direction of the molding surface 2b. According to actual measurements, if the deformation speed of the front end of the pipe fitting 5 is faster than that of the rear end, the front end of the pipe fitting 5 can be pulled out of the molding cavity 3, the pipe fitting 5 can be turned over, and the partially deformed rear end of the pipe fitting 5 can be inserted into the molding cavity 3, and the flanging and expansion of the rear end of the pipe fitting 5 can be achieved in the same way.

[0028] In addition to the above scheme, the positioning structure may also include a magnetic part 1 fixed on the main body 1 and a magnetic part 2 fixed at a corresponding position on the limiting sleeve 2. The main body 1 and the limiting sleeve 2 can be positioned relative to each other through the magnetic attraction between the magnetic part 1 and the magnetic part 2. Here, the magnetic part 1 and the magnetic part 2 may both be magnets, or one may be a magnet and the other may be made of a material that can generate magnetic attraction with the magnet. In addition to the threaded connection between the molding head 1a and the base 1c, the molding head 1a and the base 1c may also be connected by commonly used detachable connection methods such as plug-in, clip-on, and fastener connection.

[0029] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A flanging and flaring tool, comprising a main body (1), the main body (1) having a columnar forming head (1a), the outer side of the forming head (1a) having a forming surface (1b), characterized in that: The flanging and flaring tool further comprises a cylindrical limiting sleeve (2) sleeved on the outside of the forming head (1a), and the limiting sleeve (2) and the main body (1) are of a split structure, a forming cavity (3) for inserting a pipe (5) is formed between the limiting sleeve (2) and the forming head (1a), and a positioning structure capable of positioning the two is also provided between the limiting sleeve (2) and the main body (1), the forming surface (1b) comprises a forming section 1 which is a conical surface and a forming section 2 which is a concave curved surface, and there is a smooth transition between the forming section 1 and the forming section 2, and the flanging and flaring tool further comprises a hand-held The handle (4) has a protruding columnar forming head (4a) on one side, the outer wall of the forming head (4a) has a forming surface (4b), the other side of the handle (4) has a protruding gripping portion (4c) that can be gripped by hand, and the side wall of the handle (4) between the forming head (4a) and the gripping portion (4c) has a ring-shaped stop shoulder (4d) protruding outward, the side of the stop shoulder (4d) facing the forming head (4a) is a plane, and the forming surface (4b) can extend to the plane of the stop shoulder (4d).

2. The flanging and flaring tool according to claim 1, characterized in that: The positioning structure comprises a protruding annular boss (1d) on the main body (1) and a recessed annular groove (2b) on the limiting sleeve (2), wherein the protruding boss (1d) can be correspondingly inserted into the groove (2b).

3. The flanging and flaring tool according to claim 1, characterized in that: The positioning structure comprises a first magnetic part fixed on the main body (1) and a second magnetic part fixed at a corresponding position on the limiting sleeve (2); the main body (1) and the limiting sleeve (2) can be positioned relative to each other through the magnetic attraction between the first magnetic part and the second magnetic part.

4. The flanging and flaring tool according to claim 1, 2 or 3, characterized in that: The main body (1) further comprises a base (1c), the molding head (1a) is detachably connected to one side of the base (1c), and the other side of the base (1c) is a plane.

5. The flanging and flaring tool according to claim 1, 2 or 3, characterized in that: The inner side of the limiting sleeve (2) facing the other end of the main body (1) is provided with an inclined guide surface (2a).

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